Shock-absorber.



J. M. J AGKSON SHOCK ABSORBER. APPLIOATION FILED DEC. 29, 1909. RENEWED NOV. 8

Patented Mar. 14, 1911.

WITNESSES.

ATTORNEYS v Application med'nmmter 29, 1909, serial No. 535,411.

can be applied to any automobile to act as render the shock or jolts practically negligible when traveling at high speed bracket or hanger B which is securely bolted at its upper end to the UNITED sTA Es PATENT OFFICE.

unns' umsoniucxson, or mnxnnsnuac, wnsr VIRGINIA.

' SHOCK-ABSORBER.

Specification of Letters Patent.

Renewed November 8, 1910. Serial No. 591,328.

Patented Mar. 14, 1911.

To all whom it may concern:

Be it known that I, JAMES MADISON JACK- SON, a citizen of the United States, and a resident ofParkersburg, in thecounty of Wood and State. of West Virginia, have invented certain new and useful Improvements in Shock-Absorbers, of which the following is a specification.

My invention relates to improvements in devices, auxiliary to the ordinary spring gear, for absorbing the shock or jolts incident to automobiles passing over obstructions or depressions.

The object of my invention is to produce a simple, cheap and eiiicient device which an auxiliary to the ordinary spring gear to and under normal conditions of travel.

My invention consists in certain novel features of construction, arrangement and combination of parts as will be hereinafter the cylinder 0 fully described and shown in the drawing, in which:- I

'Figure 1 is a view showing the device as viewed from the front or rearQ Fig. 2 is a. vertical section of a portion of the device. Fig. 3 is a section through axle, showing means of'clamping lower end of spring to the axle.

In carrying out my invention, I attach to the frame A of an automobile the rigid to the frame through the flanges B. Near the outer end of the hanger a hole or opening is drilled and in this opening is fitted a steel bushing B, the upper edge of which will be substantially flush with the upper face of the hanger, while the lower end of the bushing does not reach quite to the lower face of the hanger. This bushing is retained within the hole in the hanger by a set screw I), the head of which fits Into a countersunk socket in the outer face of the hanger. Fitted within the bushing is a metal cylinder 0, through which passes a screw rod or bolt D having the head D at its lower end; a coiled sprin E is fastened bolt by clamping. the end of the spring against the head D by a nut D The lower end of the spring E is fastened in the same way to the bottom the frame of the vehicle,

hanger or clip F, said clip being secured to the axle, as shown. The spring is preferfiber washer G and on this a steel washer H,

,and then screw on the bolt 1) the nut I which clamps the washers G and H securely against the upper end of the cylinder 0. Atthe lower end of the cylinder C, I similarly arrange the washers G and H, the fiber washer G and the steel washer H being socurely clamped by the jam nut J. The purpose of the fiber washers is to prevent the clicking noise that would result should metal washers come in contact with the metal han er.

y shock absorber, it should be understood, is an auxiliary to the ordinary sprin gear of the automobile, and under normal road conditions, will not come into action, as which plays through the bushing in the hanger is of sufiicient length (say L} to 3 inches) to give no aid to the ordinary springs under ordinary conditions. If, now, abnormal road conditions are encountered, such as rocks, logs or deep ruts in the roadbd, the hanger and axle will approach each other and as soon as the hanger engages the fiber washers at either end of the cylinder 0, the spring will be distended or compressed accordingly as the hanger travels upwardly or downwardly, or when the axle forces the spring upwardly or downward] Hence, it will be seen that the shock or jolt is graduallyabsorbed and will be hardly noticeable by persons riding in the automobile.

The device can be adjusted and regulated for varying conditions of car or road by means of the jam nuts I and J as by these the cylinder 0 can be adjusted along the length of the screw bar or bolt D.

I claim g 1. A shock absorber for motor vehicles, consisting of a bracket or hanger secured to a coiled spring se cured to the axle of the same, a rod extending upwardly from the upper end of the spring through the aforesaid hanger or bracket. and n'ieans for both regulating and limiting the vertical play of the rod through the hanger or bracket, said means located on the rod both above and below the bracket.

2. A shock absorber for motor vehicles consisting of a bracket or hanger adapted the axle of the same,

to be secured to the frame of the vehicle, a vertically disposed coiled spring secured to a rod extending upwardly from the upper end of the spring through the aforesaid and vertically adjustable collars mounted on said rod above and below the bracket or hanger adapted to limit the up or down movement of said rod.

3. A shock absorber for vehiclesconsisting of a bracket or hanger adapted to be rigidly secured to the frame of the vehicle, a'vertically disposed coiled spring secured to theaxle of the same, a threaded rodextending upwardly from the upper end of the spring and hanger, and nuts threaded on said rod above and below said bracket or hanger adapted to limit andregulate the up or down play of said rod.

4. A shock absorber for consisting of a bracket or to be rigidly secured to the frame of the vehicle, said bracket having a vertical opening therethrough, a bushing rigidly secured in said opening, a vertically disposed coiled spring secured to the axle of the vehicle, a rod extending upwardly from the upper end of the spring and through the bushing in the bracket, and means on the rod both above and below the bracket for limiting motor vehicles the vertical movement of said rod through the bushing. v

5. A shock absorber for motor vehicles consisting of a bracket or hanger adapted to be rigidly secured to the frame of the vehicle, said bracket having a vertical opening therethrough, a vertically 1 disposed coiled spring secured to the axle of the ve hicle, a rod extending upwardly from the upper end of the spring, and through the ,opening in the bracket, a sleeve surround- 4 mg sald rod and passing through the aforesaid opening in the bracket,

bracket or hanger,.

through the bracket or hanger adapted be rigidly and adjustable i collars mounted on the rod above and below 7 the said sleeve adapted to regulate themovement of the sleeve on the rod and also to limit the up or downplay of'the rod.

6. A shock absorber for motor vehicles comprising a bracket or hanger ada ted to frame of the vehice, said bracket having a vertical opening there? through,

be secured to the a bushing secured in said opening, a vertically'disposed coiled spring adapted to .be secured to the axle of the vehicle, a threaded rod projecting upwardly from the upper end of the coiled spring, a vertically movable sleeve loosely surrounding said rod and passing through the bushing, and adjustable collars mounted on said rod at the upper and lower ends of the sleeve to regulate the inovement of'the sleeve on the rod and also to limit the up or down play of the rod. a

7. A shock absorbenfor imotor vehicles comprising a bracket or hanger adapted to attached to the frame of the vehicle, said bracket having a vertical.open-' ing therethrough, a bushing rigidlysecured a vertically disposed coiled in said opening, spring adapted to be rigidly secured at its lower end to the axle of the vehicle, a threaded rod secured at its lower end to the upper end of the spring and extending through the bushing in the bracket, a vertically movable sleeve loosely surrounding said threaded rod and extending through the bushing, sound deadening washers fitted on said rod at the upper and. lower ends of the sleeve, and jam nuts mounted on the threaded rods above and below said wa hers be vertically? adwhereby the sleeve may justed relative to the threaded. rod and the up or down play of the rod limited. Y

- JAMES MADISON JACKSON. Witnesses:

SAUL B. Saunas, IRENE M. KELLY. 

